Parent

NS records at parent servers

Glue at parent nameservers
7/7

SUCCESS
Parent nameservers know A records for your domain, Very good !

NS

Mismatched glue
0/7

The glue provided by the root servers does not match glue that provided by your authoritative DNS servers.

(dns1.yandex.net. 172800 IN A 213.180.204.213) present at Parent, missing at (213.180.204.213, 93.158.134.213)

(dns2.yandex.net. 172800 IN A 93.158.134.213) present at Parent, missing at (213.180.204.213, 93.158.134.213)

Nameservers A records
0/7

Some servers does not provide A records for nameservers.

missing A record(s) for (dns1.yandex.net,dns2.yandex.net) at nameserver 213.180.204.213

missing A record(s) for (dns2.yandex.net,dns1.yandex.net) at nameserver 93.158.134.213

Nameservers report identical NS records
7/7

SUCCESS
The NS records at all your nameservers are identical.

Nameservers respond
10/10

SUCCESS
All of your nameservers listed at the parent nameservers responded.

Nameserver name validity
7/7

SUCCESS
All of the NS records that your nameservers report are valid (no IPs or partial domain names).

Number of nameservers
2/5

WARNING
You have 2 nameservers. You must have at least 2 nameservers (RFC2182 section 5 recommends at least 3 nameservers), and preferably no more than 7.

Lame nameservers
7/7

SUCCESS
All the nameservers listed at the parent servers answer authoritatively for your domain.

Missing (stealth) nameservers
7/7

SUCCESS
All your nameservers are also listed at the parent servers.

Root missing nameservers
7/7

SUCCESS
All of the nameservers listed at the parent nameservers are also listed as NS records at your nameservers.

Nameservers on separate class C's
7/7

SUCCESS
Nameservers are in a different networks.

public IPs
7/7

SUCCESS
All of your NS records appear to use public IPs.

SOA

SOA record

SOA record is:

Hostmaster email

hmm26.yandex.ru

Serial

2013082903

Refresh

14400

Retry

900

Expire

1209600

TTL

21600

Serial agreement
7/7

SUCCESS
All your nameservers agree that your SOA serial number is 2013082903 That means that all your nameservers are using the same data.

SOA MNAME
3/3

SUCCESS
SOA (Start of Authority) record states that your master (primary) name server is: dns1.yandex.net That server is listed at the parent servers, which is correct.

Serial value
1/1

SUCCESS
SOA serial number is: 2013082903 This appears to be in the recommended format of YYYYMMDDnn, where 'nn' is the revision. This number must be incremented every time you make a DNS change.

Refresh value
1/1

SUCCESS
SOA Retry interval is : 14400 seconds. This seems OK. (Values about 3600-7200 seconds is good if not using DNS NOTIFY; RFC1912 2.2 recommends a value between 1200 to 43200 seconds (20 minutes to 12 hours)). This value determines how often secondary/slave nameservers check with the master for updates.

Retry value
1/1

SUCCESS
SOA Retry interval is : 900 seconds. This seems OK. (Values about 120-7200 seconds is good). The retry value is the amount of time your secondary/slave nameservers will wait to contact the master nameserver again if the last attempt failed.

Expire value
1/1

SUCCESS
SOA Expire time is : 1209600 seconds. This seems OK. (Values 604800 to 2419200 seconds (1-4 weeks) is good). RFC1912 suggests 2-4 weeks. This is how long a secondary/slave nameserver will wait before considering its DNS data stale if it can't reach the primary nameserver.

TTL value
1/1

SUCCESS
SOA Expire time is : 21600 seconds. This seems OK. (about 300 to 86400 seconds or 5 min - 24 hours is good). RFC2308 suggests a value of 1-3 hours. This value used to determine the default (technically, minimum) TTL (time-to-live) for DNS entries, but now is used for negative caching.

Info

DNS trace

Trace to nspglobal.net

lookup nspglobal.net at A.ROOT-SERVERS.NET(198.41.0.4) 11 msA.ROOT-SERVERS.NET(198.41.0.4) refer to a.gtld-servers.net(192.5.6.30)
lookup nspglobal.net at a.gtld-servers.net(192.5.6.30) 20 msa.gtld-servers.net(192.5.6.30) refer to dns1.yandex.net(213.180.204.213)
lookup nspglobal.net at dns1.yandex.net(213.180.204.213) 131 msgot A record 'nspglobal.net IN A 188.127.237.67' from nspglobal.net(213.180.204.213)